package com.alibaba.jstorm.yarn.thrift;


import java.util.Map;

import javax.security.auth.login.Configuration;

import org.apache.thrift7.TProcessor;
import org.apache.thrift7.server.TServer;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

public class ThriftServer {
	private static final Logger LOG = LoggerFactory
			.getLogger(ThriftServer.class);
	private Map _storm_conf; // storm configuration
	protected TProcessor _processor = null;
	private int _port = 0;
	private TServer _server = null;
	private Configuration _login_conf;

	public ThriftServer(Map storm_conf, TProcessor processor, int port) {
		try {
			_storm_conf = storm_conf;
			_processor = processor;
			_port = port;

			// retrieve authentication configuration
			_login_conf = AuthUtils.GetConfiguration(_storm_conf);
		} catch (Exception x) {
			LOG.error(x.getMessage(), x);
		}
	}

	public void stop() {
		if (_server != null)
			_server.stop();
	}

	/**
	 * Is ThriftServer listening to requests?
	 * 
	 * @return
	 */
	public boolean isServing() {
		if (_server == null)
			return false;
		return _server.isServing();
	}

	public void serve() {
		try {
			// locate our thrift transport plugin
			ITransportPlugin transportPlugin = AuthUtils.GetTransportPlugin(
					_storm_conf, _login_conf);

			// server
			_server = transportPlugin.getServer(_port, _processor);

			// start accepting requests
			_server.serve();
		} catch (Exception ex) {
			LOG.error("ThriftServer is being stopped due to: " + ex, ex);
			if (_server != null)
				_server.stop();
			Runtime.getRuntime().halt(1); // shutdown server process since we
											// could not handle Thrift requests
											// any more
		}
	}
}
